. The Bell System technical journal . + + Fig. —Marking the sense of righthand and lefthand sections. Fig. —Making the rotations Ai the rays should point toward the plus electric axis, for left-hand quartzthe rays should point towards the negative electric axis. The section is now placed on the carriage plate, one ray pointing towardsthe operator (which ray is decided on the basis of the economy of quartz). SAW

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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1